UTM Products Supporting HA

Hello,

I've Being Searching for some Time for Information About the Sophos Essential UTM Solution.

With the Exception of these Thread: https://www.sophos.com/en-us/products/free-tools/sophos-utm-essential-firewall.aspx 

I've Found no additional Feature Information, Especially on High Availability.

Is there Any Information About Feature Differences Between Sophos UTM 9 and the Essential Firewall Edition?

If there is in fact An HA Option, Is it the Same as the normal UTM9 ? (active passive and such..)

p.s 

It would have being great if there was a Differences Table of all UTM products (cloud, on-premise, essential etc)

thanks!